#3F3FB1#3F3FB1

#3F3FB1 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.176 H 276.4°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F3FB1
RGB	rgb(63, 63, 177)
HSL	hsl(240, 48%, 47%)
HSV	hsv(240, 64%, 69%)
CMYK	cmyk(64.4%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(33.53, 35.66, -60.73)
CIE-LCH	lch(33.53, 70.42, 300.42°)
OKLab	oklab(44.17% 0.0197 -0.175)
OKLCH	oklch(44.17% 0.176 276.4)
XYZ	xyz(11.7606, 7.7851, 42.4694)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F3FB1 #B1B13F

analogous

#3F78B1 #3F3FB1 #783FB1

triadic

#3F3FB1 #B13F3F #3FB13F

tetradic

#3F3FB1 #B13F78 #B1B13F #3FB178

square

#3F3FB1 #B13F78 #B1B13F #3FB178

split-complementary

#3F3FB1 #B1783F #78B13F

monochromatic

#1F1F57 #2F2F84 #3F3FB1 #6565C8 #9292D8

Accessibility & contrast

On white

8.21

#3F3FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3F3FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F3FB1

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F3FB1	#FFFFFF	#000000	##FFFFFF
##3F3FB1	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#004AAF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f3fb1;
/* rgb */ color: rgb(63, 63, 177);
/* oklch */ color: oklch(44.2% 0.176 276.4);

Tailwind

colors: {
  custom: {
    50: '#8174c9',
    500: '#3f3fb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f3fb1;
$custom-light: #8174c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f3fb1",
  "rgb": {
    "r": 63,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 240,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44166,
    "c": 0.17615,
    "h": 276.4
  },
  "luminance": 0.07786
}

Semantic roles & 50–950 ramp

primary

#3F3FB1

secondary

#C4C488

accent

#D751D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F3FB1

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →